---Bob looks upset. What has happened to him? ---Perhaps his failure to the exam___ his low spirits.
Facing the ________situation, the boss of the company looked____.A. puzzling, puzzled B. puzzling, puzzlingC puzzled, puzzled D. puzzled, puzzling
As we all know, _________ car is becoming _________ popular way of transportation in big cities.
The climate is changeable in this area. You should prepare more clothes ___________ the sudden change of weather.
Any behavior that is repeated enough times will ________ become a habit and happen automatically.
The two newspapers have offered ______ views as to the same issue, which means they take different stands.